Crossbar chain



Man 3, m5 1,528,357-

M. ZWICKY CROSSBAR CHAIN Filed Aug. 22, 1924 WM INVENTOR. By 72m A TTORNEYS Patented Mar. 3, 1925.

UNITED STATES;

PATENT OFFICE.

MEL CHIOR ZWICKY, OF SPRING TOWNSHIP, BERKSOOUNTY, PENNSYLVANIA, AS- SIGNOR T0 TEXTILE MACHINE WORKS, OF WYOMISSING, PENNSYLVANIA, A 'COR- PO'RA'IION OF PENNSYLVANIA.

GROSSBAR CHAIN.

Application filed August 22, 1924. Serial No. 733,491".

To all whom it may concern:

Be it known that I, MELCHIOR ZwIcKY, a citizen, of the United States, residing in Spring Township, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in" Crossbar Chains, of which the following is a specification.

My invention relates to chains having parallel crossbars with end link connections; and my main objects are, first to provide an improved chain of this type which will be 'so limitedly flexible as to permit of itspassing freely around an engaging wheel while at the same time avoiding an undesired degree of such flexibility and securing substantial lateral rigidity; and second to provide a simple and advantageously novel chain construction of this type. The invention is fully described in connection with the accompanying drawings illustrating an embodiment thereof in which the cross-bars are adapted for the desired securing of pattern-controlling lugs; and the novel features are clearly defined in the claims.

Fig. 1 is a partly sectional plan view of a portion of flattened-out ch'ain embodying my invention;-the fiat crossbars indicate being shown apertured for the convenient securing of pattern lugs, and a cross-sec-- being omitted to clearly show the link aperture; and others being shown in cross-section on the line 22 of Fig. 1, or in end view with indication of the riveting shown in Fig. 1 for retaining the links on the engaged bar.

Fig. 2 of the drawing indie-ates a toothed drive wheel around which my improved chain is bent as permitted bythe novel construction; such bending however being represented as approximately the maximum allowed by the lmk and crossbar connections shown, so that when free from the wheel the chain will fold only to about the same degree and be free of objectionablecontact of the links and crossbars forming thesame. The parallel crossbars shown are adapted, by means of the series of screw-threaded apertures B shown therein, to permit of easy application as required, of pattern lugs G such as are commonly employed in textile machinery in connection with a drive wheel as indicated.

The crossbars 10, 10, as indicated, are conveniently formed generally of rolled metal of desired cross-section, as one-half inch wide by one-eighth inch thick and of any longitudinal extent with the width of the connecting-end portions 11 of the crossbars, and its end walls 17, 17 are curved, as shown, to the same radius as the edge portions 13, 13 of the latter. Thus no longitudinal move ment of the bar is allowed in an engaged link; but a limited rotary movement of the bar on its axis is permitted in the engaged link by makin each aperture 16. determinedly wider t an the thickness of the engaged bar end 11, as clearl shown in Fig. 2; thus giving the chain su cient flexibility to permlt of its freely curving around wheel A with the curved edges 13 of the connect-- ing end portions 11 of the bar always in sliding contact with the similarlv curved walls 17 of the link apeitures but with the flexibility definitel limited as determined by the width 0 the link apertures relative to the thickness of the engaged bar ends. This functioning feature of my improved chain is of practical importance for many uses, and its novel construction is very simple and advantageous. What I claim ist 1. A cross-bar chain having a limited linking flexibility; comprising'a series of crossbars having shouldered flat ends and opposed series of overlapped connecting links; eachlink being provided with engaging apertures corresponding in longitudinal extent with the width of said fiat ends and exceeding in lateral extent the thickness of the latter, and overlapping portions of adjacent links being 'loosely retained upon a flat end of each crossbar.

. 2. A cross-bar chain having a limited linking flexibility; comprising a series of crossbars having shouldered flat ends and opposed series of overlapped connecting links; each link being provided with engaging apertures corresponding in longitudinal extent with the width of said fiat ends and 1 exceeding'in lateral extent the thickness of the latter; the end Walls of said link apertures and the side edges of said bar ends being concentrically curved, and overlapping portions of adjacent links being loosely 15 retained upon each bar end.

In testimony whereofl affix my signature.

MELOHIOR ZWIOKY. 

